Which one of the following is a group of major green house gases ?

Options

A. Carbon monoxide, methane, chlorofluoro carbons and oxides of nitrogen
B. Carbon dioxide, oxides of nitrogen , ethane and chlorofluoro carbons
C. Carbon dioxide, methane chlorofluoro carbons and oxides of nitrogen
D. Ethane, oxides of nitrogen , carbon mono-oxide and chlorofluoro carbons

Answer

To solve the question about identifying a group of major greenhouse gases, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Greenhouse Gases**: Begin by understanding what greenhouse gases are. These are gases that trap heat in the atmosphere, contributing to the greenhouse effect, which leads to global warming.

2. **Identify Major Greenhouse Gases**: The major greenhouse gases include:
- Carbon Dioxide (CO2)
- Methane (CH4)
- Nitrous Oxide (N2O)
- Ozone (O3)
- Chlorofluorocarbons (CFCs)

3. **Analyze the Options**: Look at the options provided in the question:
- Option A: Carbon monoxide, ethane, chlorofluorocarbons
- Option B: Oxides of nitrogen, carbon dioxide
- Option C: Ethane, chlorofluorocarbons, carbon dioxide, ethane, oxides of nitrogen
- Option D: Carbon dioxide, ethane, chlorofluorocarbons, and oxides of nitrogen
- Option E: Ethane, oxides of nitrogen, carbon monoxide, and chlorofluorocarbons

4. **Evaluate Each Option**:
- **Option A**: Incorrect, as it lacks carbon dioxide and methane.
- **Option B**: Incorrect, as it lacks methane and chlorofluorocarbons.
- **Option C**: Incorrect, as it contains ethane which is not a major greenhouse gas.
- **Option D**: Correct, as it includes carbon dioxide, chlorofluorocarbons, and oxides of nitrogen.
- **Option E**: Incorrect, as it lacks carbon dioxide and methane.

5. **Select the Correct Answer**: Based on the evaluation, the correct answer is **Option D: Carbon dioxide, ethane, chlorofluorocarbons, and oxides of nitrogen**.

### Final Answer:
The group of major greenhouse gases is **Option D: Carbon dioxide, ethane, chlorofluorocarbons, and oxides of nitrogen**.